
/*对导航栏进行设计
**/
body{background: rgba(0,0,0,0.1); padding-bottom: 20px;font-size:62.5%;font-family: "微软雅黑";}
.topnav{width:100%; height: 53px; z-index:99;top: 50px;overflow: hidden;position: fixed;  }
.topul li{ width: 100%;}
.topul{position: absolute;width: 100%;}
.topul li a{  width:25%; color: gray; display:block; float: left; background: white; height: 50px;line-height:50px;  font-size: 1rem;    text-align: center; }

.topul li:nth-child(1){position: absolute; left: 0px;color:#0099FF;}
.topul li:nth-child(2){position: absolute; left: 25%; }
.topul li:nth-child(3){position: absolute; left: 50%; }
.topul li:nth-child(4){position: absolute; left: 75%; }
.topul li:nth-child(5){position: absolute; left: 100%; }
.topul li:nth-child(6){position: absolute; left: 125%; }
.topul li:nth-child(7){position: absolute; left: 150%; }
 .select{color:#0099FF;border-bottom:#FB7217 3px solid; }

